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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, in Merthyr Mawr, United Kingdom, is a frosty winter month, with an average temperature varying between 7.5°C (45.5°F) and 4.1°C (39.4°F). With average high and low temperatures of 7.5°C (45.5°F) and 4.1°C (39.4°F) respectively, January is Merthyr Mawr's coldest month. Weather in January »
Weather in February
The last month of the winter, February, is another chilly month in Merthyr Mawr, United Kingdom, with temperature in the range of an average low of 4°C (39.2°F) and an average high of 7.6°C (45.7°F). February's average high-temperature is a still chilly 7.6°C (45.7°F), maintaining a close comparison with January's 7.5°C (45.5°F). Weather in February »
Weather in March
The first month of the spring, March, is still a chilly month in Merthyr Mawr, United Kingdom, with an average temperature varying between 4.3°C (39.7°F) and 9.8°C (49.6°F). March's arrival brings an average high-temperature of a still frosty 9.8°C (49.6°F), demonstrating subtle variation from the preceding month. Weather in March »
Weather in April
April is a fresh spring month in Merthyr Mawr, United Kingdom, with an average temperature ranging between min 5.8°C (42.4°F) and max 12.3°C (54.1°F). Merthyr Mawr transitions into April recording an average high-temperature of a cool 12.3°C (54.1°F), closely aligning with the preceding month's temperature. Weather in April »
Weather in May
The last month of the spring, May, is a moderate month in Merthyr Mawr, United Kingdom, with temperature in the range of an average high of 14.6°C (58.3°F) and an average low of 8.3°C (46.9°F). A minor adjustment in Merthyr Mawr's average high-temperature is noted with the start of May, touching a refreshing 14.6°C (58.3°F) from April's 12.3°C (54.1°F). Weather in May »
Weather in June
June, the first month of the summer in Merthyr Mawr, is a refreshing month, with temperature in the range of an average low of 10.9°C (51.6°F) and an average high of 17.1°C (62.8°F). The transition from May to June sees an average high-temperature of a comfortable 17.1°C (62.8°F), indicating a minor variance from the prior month. Weather in June »
Weather in July
July, like June, in Merthyr Mawr, United Kingdom, is another comfortable summer month, with an average temperature fluctuating between 12.7°C (54.9°F) and 18.8°C (65.8°F). Merthyr Mawr's temperature records reveal July as the warmest month, marked by average highs of 18.8°C (65.8°F) and lows of 12.7°C (54.9°F). Weather in July »
Weather in August
The last month of the summer, August, is another comfortable month in Merthyr Mawr, United Kingdom, with an average temperature varying between 18.3°C (64.9°F) and 13.2°C (55.8°F). The advent of August sees the average high-temperature at a still refreshing 18.3°C (64.9°F), subtly shifted from July's 18.8°C (65.8°F). Weather in August »
Weather in September
September, the first month of the autumn in Merthyr Mawr, is still a comfortable month, with an average temperature varying between 16.7°C (62.1°F) and 11.3°C (52.3°F). The shift from August to September is characterized by an average high-temperature of a still enjoyable 16.7°C (62.1°F), not significantly different from the 18.3°C (64.9°F) of August. Weather in September »
Weather in October
October, the same as September, in Merthyr Mawr, United Kingdom, is another refreshing autumn month, with an average temperature ranging between max 14°C (57.2°F) and min 9.7°C (49.5°F). The initiation of October sees an average high-temperature of a mild 14°C (57.2°F), showing minor variations from the previous month. Weather in October »
Weather in November
The last month of the autumn, November, is another cool month in Merthyr Mawr, United Kingdom, with temperature in the range of an average high of 10.3°C (50.5°F) and an average low of 6.9°C (44.4°F). As October makes way for November, Merthyr Mawr's average high-temperature eases from a moderate 14°C (57.2°F) to a fresh 10.3°C (50.5°F). Weather in November »
Weather in December
December, the first month of the winter in Merthyr Mawr, is also a frosty month, with an average temperature varying between 5.3°C (41.5°F) and 8.5°C (47.3°F). December observes an average high-temperature of a frosty 8.5°C (47.3°F), marking an insignificant difference from November's 10.3°C (50.5°F). Weather in December »
Frequently asked questions
What is the coldest month in Merthyr Mawr?
Merthyr Mawr notes the coldest temperatures in January, with a average high of 7.5°C (45.5°F) and a low of 4.1°C (39.4°F).
How much does it rain in Merthyr Mawr?
In Merthyr Mawr, during the entire year, the rain falls for 197.2 days and collects up to 669mm (26.34") of precipitation.
When does it snow in Merthyr Mawr?
January through March and December are months with snowfall in Merthyr Mawr, United Kingdom.
How many days does it snow in Merthyr Mawr?
Throughout the year, in Merthyr Mawr, there are 3.6 snowfall days, and 21mm (0.83") of snow is accumulated.
What is the month with the least sunshine in Merthyr Mawr?
The month with the least sunshine is January, with an average of 3.6h of sunshine.
What is the month with the lowest UV index in Merthyr Mawr?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
What are the least humid months in Merthyr Mawr?
The months with the lowest humidity in Merthyr Mawr, United Kingdom, are April and May, with an average relative humidity of 81%.
What is the driest month in Merthyr Mawr?
The month with the least rainfall is April, when the rain falls for 14.8 days and typically collects 32mm (1.26") of precipitation.
When it does not snow in Merthyr Mawr?
April through November are months without snowfall.
What month has the most sunshine in Merthyr Mawr?
The month with the most sunshine in Merthyr Mawr is May, with an average of 8h of sunshine.
When is the highest UV index in Merthyr Mawr?
The months with the highest UV index in Merthyr Mawr, United Kingdom, are May through September, with an average maximum UV index of 4.
When are the longest days in Merthyr Mawr?
June has the longest days of the year in Merthyr Mawr, with an average of 16h and 36min of daylight.
What are the warmest months in Merthyr Mawr?
July temperatures tend to peak at an average high of 18.8°C (65.8°F) and dip to a low of 12.7°C (54.9°F).
When is Daylight Saving Time (DST) in Merthyr Mawr?
On Sunday, 27. October 2024, at 2:00 am, Daylight Saving Time ends in Merthyr Mawr, and the time zone changes from BST to GMT. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 1:00 am, and the time zone reverts from GMT to BST.
What is the rainiest month in Merthyr Mawr?
The month with the most rainfall in Merthyr Mawr is November, when the rain falls for 19.1 days and typically aggregates up to 79mm (3.11") of precipitation.
What is the most humid month in Merthyr Mawr?
December is the most humid month in Merthyr Mawr, with an average relative humidity of 86%.
What is the snowiest month in Merthyr Mawr?
The month with the most snowfall is December, when snow falls for 0.8 days and typically aggregates up to 9mm (0.35") of snow.
What is the month with the shortest days in Merthyr Mawr?
The month with the shortest days is December, with an average of 7h and 54min of daylight.
Average temperature
Merthyr Mawr, United Kingdom
The warmest month (with the highest average high temperature) is July (18.8°C).
The month with the lowest average high temperature is January (7.5°C).
The month with the highest average low temperature is August (13.2°C).
The coldest month (with the lowest average low temperature) is February (4°C).
Average pressure
Merthyr Mawr, United Kingdom
- Average pressure in January:
1013.9mbar - Average pressure in February:
1013.4mbar - Average pressure in March:
1015.3mbar - Average pressure in April:
1015.3mbar - Average pressure in May:
1016.7mbar - Average pressure in June:
1016mbar
- Average pressure in July:
1015.2mbar - Average pressure in August:
1014.7mbar - Average pressure in September:
1016.7mbar - Average pressure in October:
1014.5mbar - Average pressure in November:
1009.9mbar - Average pressure in December:
1013.9mbar
The months with the highest atmospheric pressure are May and September (1016.7mbar).
The month with the lowest atmospheric pressure is November (1009.9mbar).
Average wind speed
Merthyr Mawr, United Kingdom
- Average wind speed in January:
22.5km/h - Average wind speed in February:
23km/h - Average wind speed in March:
20.3km/h - Average wind speed in April:
16.9km/h - Average wind speed in May:
16.4km/h - Average wind speed in June:
15.5km/h
- Average wind speed in July:
15.7km/h - Average wind speed in August:
16.5km/h - Average wind speed in September:
16.9km/h - Average wind speed in October:
19.3km/h - Average wind speed in November:
21.7km/h - Average wind speed in December:
23.1km/h
The windiest month (with the highest average wind speed) is December (23.1km/h).
The calmest month (with the lowest average wind speed) is June (15.5km/h).
Average humidity
Merthyr Mawr, United Kingdom
The month with the highest relative humidity is December (86%).
The months with the lowest relative humidity are April and May (81%).
Average rainfall
Merthyr Mawr, United Kingdom
The wettest month (with the highest rainfall) is November (79mm).
The driest month (with the least rainfall) is April (32mm).
Average rainfall days
Merthyr Mawr, United Kingdom
- Average rainfall days in January:
16.8 days - Average rainfall days in February:
13.9 days - Average rainfall days in March:
14.6 days - Average rainfall days in April:
14.8 days - Average rainfall days in May:
15.3 days - Average rainfall days in June:
16.6 days
- Average rainfall days in July:
18.1 days - Average rainfall days in August:
18.8 days - Average rainfall days in September:
15.1 days - Average rainfall days in October:
16.1 days - Average rainfall days in November:
19.1 days - Average rainfall days in December:
18 days
The month with the highest number of rainy days is November (19.1 days).
The month with the least rainy days is February (13.9 days).
Average snowfall
Merthyr Mawr, United Kingdom
The month with the highest snowfall is December (9mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days
Merthyr Mawr, United Kingdom
- Average snowfall days in January:
0.9 days - Average snowfall days in February:
1.3 days - Average snowfall days in March:
0.5 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.1 days - Average snowfall days in December:
0.8 days
The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Merthyr Mawr, United Kingdom
- Average daylight in January:
8h and 3min - Average daylight in February:
10h and 0min - Average daylight in March:
11h and 5min - Average daylight in April:
13h and 5min - Average daylight in May:
15h and 4min - Average daylight in June:
16h and 4min
- Average daylight in July:
16h and 1min - Average daylight in August:
14h and 3min - Average daylight in September:
12h and 4min - Average daylight in October:
10h and 4min - Average daylight in November:
8h and 5min - Average daylight in December:
7h and 5min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in January:
3h and 4min - Average sunshine in February:
3h and 5min - Average sunshine in March:
5h and 4min - Average sunshine in April:
7h and 5min - Average sunshine in May:
8h and 0min - Average sunshine in June:
7h and 2min
- Average sunshine in July:
7h and 4min - Average sunshine in August:
7h and 0min - Average sunshine in September:
6h and 4min - Average sunshine in October:
4h and 2min - Average sunshine in November:
3h and 5min - Average sunshine in December:
3h and 5min
The month with the most sunshine is May (Average sunshine: 8h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days
Merthyr Mawr, United Kingdom
- Average sunshine days in January:
11.3 days - Average sunshine days in February:
10.6 days - Average sunshine days in March:
12.9 days - Average sunshine days in April:
13.2 days - Average sunshine days in May:
13.5 days - Average sunshine days in June:
11.1 days
- Average sunshine days in July:
10.3 days - Average sunshine days in August:
9.4 days - Average sunshine days in September:
11.8 days - Average sunshine days in October:
11 days - Average sunshine days in November:
9 days - Average sunshine days in December:
9.5 days
The month with the most sunshine days is May (13.5 days).
The month with the least sunshine days is November (9 days).
Average UV index
Merthyr Mawr, United Kingdom
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Merthyr Mawr, United Kingdom
The month with the most cloud cover is November (Cloud cover 64).
The month with the least cloud cover is April (Cloud cover 48).
Average visibility
Merthyr Mawr, United Kingdom
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Merthyr Mawr, United Kingdom
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